Switch



E A. FAGERLUND.

SWITCH.

APPLICATION FILED FEB.'?, 1919.

1,351,161. PatentedAug. 31,1920.

In vent-01 EATayerlzuuZ,

UNITED STATES PATENT, OFFICE.

ERIK ABTUR FAGERLUND, OF STOOKI-IDLM, SWEDEN.

SWITCH.

To all whom it may concern:

lie it known that I, Emu Anton FAGER- LUND, engineer, subject of theKing of Sweden, residing at Stockholm, Sweden, have invented certain newand useful Improvements in Switches, of which the following is aspecification.

This invention relates particularly to that type of electric switchsuitable for lighting installations, in which the movable contact memberis a swing lever or the like co-acting with a resilient locking device,the said swing lever being operated either by push buttons, ordirectlyby a handle attached to the contact member, or in some other suitableway.

Switches of this type are well known, in which the resilient lockingdevice consists of a spring actuated roller or the like which, whenoperated by the contact member, moves rapidly to one or the other sideof a projection co-acting with the roller. The object of thepresentinvention is to provide a construction of the locking device which lendsitself to a simple method of manufacturing. To this end the axle of theroller is made in the form of a flexible pin journaled at both ends infixed bearings, so that the axle of the roller serves at the same timeas a spring for the locking device. By this arrangement the constructionof the switch is simplified to a great extent as compared with switchesof this type previously known in which the roller is usually mounted soas to be moved in a guide being actuated by a helical spring, said guideas well as the separate spring being dispensed with in the presentconstruction whereby also a saving of space is attained.

The accompanying drawing illustrates a push button switch provided witha resiliout locking device according to the invention. Figures 1 and 2show the switch in sectional and plan views respectively the cover andthe swing lever being removed in Fig. 2. I

The switching member of the switch consists of a swing lever 1 pivotallymounted on a pin 2 journaled in two lugs 5 projecting from a plate 4screwed to the switch base 3. The lever 1 in the known manner closes thecontact between two connection contacts 6 and 7 screwed to the switchbase, and is Specification of Letters Patent. Patent d A 31 1920.Application filed February '7. 1919.

Serial No. 275,644.

the switch base, thepin being retained in said grooves by the plate 4.

The lever 1 is maintained in the closing position shown by the frictionbetween the contact pieces and also by the resilient locking device 1 1.lVhen pushing the breaking button 10 the swing lever is at first movedagainst the action of the locking device 141, 15 and then through theinfluence of this locking device into the breaking position in which itis retained, the arm 11 being then situated on the opposite side of theroller 14. The movement of the swing lever is limited by a projection 16fixed to the switch base.

Claims.

1. In an electric switch the combination with a base and a contact swinglever, of a resilient locking device for said lever con sisting of twocooperating members, one of said members being mounted on the lever andthe other on the base, one of said members being in the form of an armand the other member comprising a roller and a flexible pin carrying andforming the axle of said roller, substantially as described.

2. In an electric switch the combination with a base provided with arecess having opposed notches in the side walls thereof, an aperturedplate secured to the base, a contact lever pivoted above the plate, andcooperative means for locking the lever with respect to the baseincluding a flexible pin journaled in the notches, a roller carried bythe pin and positioned in the recess and an arm carried by the levermedially of the ends for coacting with the flexibly and rotatablymounted roller.

In testimony whereof I affix my signature in presence of two witnesses.

ERIK ARTUR FAGERLUND. Witnesses JAooB BAGGE, GEORGE D. HOPPER.

